The chemical components of an edible spice, sweet ginger (Alpinia coriandriodora D. Fang) essential oil (AEO) were identified by an ultra‐fast gas chromatography electronic nose (E‐nose) and the main components were β‐pinene (27.9%), 1,8‐cineole (17.3%), p‐cymene (13.5%), camphene (7.3%), myrcene (5.4%), and pseudolimonene (4.3%). The antioxidant activity of each component was evaluated and the mechanisms of scavenging free radical were studied by E‐nose combined with chemical methodology. Decanal and α‐copaene in AEO showed strong scavenging activities against DPPH radical, and the scavenging rates were over 85%. Decanal had a strong scavenging activity for ABTS radical and the scavenging rate was more than 60%. Similarly, terpinen‐4‐ol and eugenol had strong scavenging abilities to OH radical and the scavenging rates were more than 50%. Gas chromatography‐mass spectrography results showed that it was feasible to identify the chemical components of essential oil by E‐nose, and the similarity reached 88.9%.

中文翻译：

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甜姜（Alpinia coriandriodora D. Fang）香精油的抗氧化化合物筛选，化学组成和清除自由基的机理。

超快速气相色谱电子鼻（E-nose）鉴定了食用香料甜姜（Alpinia coriandriodora D.Fang）精油（AEO）的化学成分，主要成分为β-pine烯（27.9％） ，1,8-桉树脑（17.3％），pcy烯（13.5％），camp烯（7.3％），月桂烯（5.4％）和假li烯（4.3％）。评估了每种成分的抗氧化活性，并通过电子鼻结合化学方法研究了清除自由基的机理。AEO中的癸醛和α-异丁烯对DPPH自由基具有很强的清除活性，清除率超过85％。癸醛对ABTS自由基具有很强的清除活性，清除率超过60％。同样，萜品四醇和丁子香酚对OH自由基的清除能力强，清除率超过50％。气相色谱-质谱分析结果表明，通过电子鼻鉴别香精油的化学成分是可行的，相似度达到88.9％。